C: How do I make a number always round up

First of all, you use the data type int, which cannot hold fractional values (and will implicitly round them towards zero, even before the function is ever called.) You should use double instead, since this is the proper datatype for fractional numbers. You would also want to use the ceil(x) function, which gives the nearest whole number larger than or … Read more

the functions (procedures) in MIPS

Firstly, you might want to check this quick MIPS reference. It really helped me. Secondly, to explain jal, jr and $ra. What jal <label> does is jump to the label label and store the program counter (think of it as the address of the current instruction) in the $ra register. Now, when you want to … Read more

How do I use the filter function in Haskell?

You got it, pretty much. So the rest of the deal is designing the predicate function for your list. Assuming you already had a list called xs and a predicate function p, all you’d have to do is Often, you’ll see p defined as an anonymous, or lambda, expression, like so: It is not necessary, … Read more

Optional arguments in C function

In a C function, I want to check if an input argument (‘value’ in my case) is presented or not. i.e.: When used if(value != NULL) statement, my Console() function sends 4096 How can I check and act based on argument existence?

Using multiple .cpp files in c++ program?

You must use a tool called a “header”. In a header you declare the function that you want to use. Then you include it in both files. A header is a separate file included using the #include directive. Then you may call the other function. other.h main.cpp other.cpp

How do you pass a function as a parameter in C?

Declaration A prototype for a function which takes a function parameter looks like the following: This states that the parameter f will be a pointer to a function which has a void return type and which takes a single int parameter. The following function (print) is an example of a function which could be passed to func as a parameter because it is … Read more

How do you pass a function as a parameter in C?

Declaration A prototype for a function which takes a function parameter looks like the following: This states that the parameter f will be a pointer to a function which has a void return type and which takes a single int parameter. The following function (print) is an example of a function which could be passed to func as a parameter because it is … Read more

Haskell pattern matching – what is it?

In a nutshell, patterns are like defining piecewise functions in math. You can specify different function bodies for different arguments using patterns. When you call a function, the appropriate body is chosen by comparing the actual arguments with the various argument patterns. Read A Gentle Introduction to Haskell for more information. Compare: with the equivalent Haskell: Note … Read more